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Updated: Mar 23, 2026

Malachite Green Assay for the Discovery of Heat-Shock Protein 90 Inhibitors
Published on: January 20, 2023
Synthesis and Biological Evaluation of Novobiocin Core Analogues as Hsp90 Inhibitors
Katherine M Byrd1, Chitra Subramanian2, Jacqueline Sanchez2
1Department of Medicinal Chemistry, The University of Kansas, Wescoe Hall Drive, Malott 4070, Lawrence, KS, 66045-7563, USA.
Abstract:
Development of heat shock protein 90 (Hsp90) C-terminal inhibitors has emerged as an exciting strategy for the treatment of cancer. Previous efforts have focused on modifications to the natural products novobiocin and coumermycin. Moreover, variations in both the sugar and amide moieties have been extensively studied, whereas replacements for the coumarin core have received less attention. Herein, 24 cores were synthesized with varying distances and angles between the sugar and amide moieties. Compounds that exhibited good anti-proliferative activity against multiple cancer cell lines and Hsp90 inhibitory activity, were those that placed the sugar and amide moieties between 7.7 and 12.1 Å apart along with angles of 180°.
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